#define nop do { } while (0)
#ifdef __powerpc64__
-#define read_barrier() \
- __asm__ __volatile__ ("lwsync" : : : "memory")
+#define read_barrier() __asm__ __volatile__ ("lwsync" : : : "memory")
#else
-#define read_barrier() \
- __asm__ __volatile__ ("sync" : : : "memory")
+#define read_barrier() __asm__ __volatile__ ("sync" : : : "memory")
#endif
+#define write_barrier() __asm__ __volatile__ ("sync" : : : "memory")
+
+static inline int __ilog2(unsigned long bitmask)
+{
+ int lz;
+
+ asm ("cntlzw %0,%1" : "=r" (lz) : "r" (bitmask));
+ return 31 - lz;
+}
+
+static inline int arch_ffz(unsigned long bitmask)
+{
+ if ((bitmask = ~bitmask) == 0)
+ return 32;
+ return __ilog2(bitmask & -bitmask);
+}
+#define ARCH_HAVE_FFZ
+
#endif